Objective: In this study, the effect of interspecific and intraspecific hybridization on seed germination of pitaya was investigated. Material and Methods: Self-infertile 'Bloody Mary' (Hylocereus polyrhizus) was used as the maternal parent and 'Cosmic Charlie' (Hylocereus undatus), 'Red Jaina' (Hylocereus polyrhizus) and 'White Jaina' (Hylocereus undatus) were used as pollinators in this study. Flowers were pollinated at three different times (10: 00 pm, 00: 00 am, and 06.00 am). After pollination, seeds from each pollination combination were sown. The germination rate, average germination time, germination energy and germination index of the sown seeds were determined depending on pollination time and pollinator cultivars. Results: The research findings indicated that the germination rate was 100% in all seed sowing combinations, depending on different pollinator cultivars ('Cosmic Charlie' and 'White Jaina' are in different species from the maternal parent) and pollination times. The results revealed that interspecific hybridization did not have a negative effect on seed germination. On the other hand, germination time, germination energy and index differed as per pollinator type and pollination hours. Conclusion: According to the findings, it was concluded that interspecific hybridization in pitaya does not have problem in seed germination and results might offer an infrastructure for future breeding programme in pitaya.

Türkiye’de muz yetiştiriciliğinde üretim maliyetini arttıran en önemli unsurlardan birisi çiftlik gübresi kullanımıdır. Çiftlik gübresi fiyatının yüksek olması yanında, her zaman kalitede standartı yakalamak güçtür. Bu çalışmada, açıkta muz yetiştiriciliğinde pomza taşı kullanımının verim ve kaliteye etkileri incelenmiştir. Araştırmada çeşit olarak Dwarf Cavendish (AAA) çeşidi kullanılmış ve pomza taşının bitki başına 5 kg, 7.5 kg ve 10 kg dozları denenmiştir. Çalışmada, bitki morfolojik özellikleri (gövde çevresi, yaprak sayısı, gövde yüksekliği, hevenk sapı çevresi), meyve gelişme süresi, verim ve verim bileşenleri (tarak ve parmak sayısı, parmak ağırlığı, çevresi ve uzunluğu) ile bazı kalite kriterleri incelenmiştir. Araştırma bulguları, uygulamaların kontrole göre bitki morfolojik özelliklerinden sadece gövde yüksekliği ve hevenk sapı çevresini istatistiksel olarak etkilediğini, verim ve meyve kalite kriterlerinin hepsini olumlu yönde etkilediğini göstermiştir. Verim ile doğrudan ilişkili olan tarak sayısı, parmak sayısı, parmak ağırlığı ve hevenk ağırlığı pomza düzeyi arttıkça artış göstermiştir. Hektara verim kontrol uygulamasında 55.84 ton ve 10 kg pomza uygulamasında ise 62.93 ton olarak kaydedilmiştir. Ayrıca pomza uygulamalarının kontrol uygulamasına göre meyve gelişim süresini de kısalttığı tespit edilmiştir. Buna ilave olarak, pomza uygulamaları kalite kriterlerinden sakkaroz miktarını arttırdığı tespit edilmiştir. Araştırma sonucunda, açıkta muz yetiştiriciliği yapılan alanlarda pomza kullanımının verim ve kaliteyi kontrole göre arttırdığı belirlenmiştir. İncelenen tüm özellikler ve maliyet dikkate alındığında, açıkta muz yetiştiriciliğinde bitki başına 7.5 kg pomza uygulaması tavsiye edilmiştir.

Passionflower is a member of Passifloraceae family, it can be used as medicinal and ornamental plants in addition to its consumption as fruit in the world. Guava (Psidium guajava L.) fruits, which has a rich nutrient content, are consumed both fresh and processed. Passionfruit and guava plants, which can only be cultivated in temperate southern coasts in our country, have gained commercial importance because of the fruits' export potential, high medical importance and nutrient. This study was carried out to determine the effects of some bioactivator applications on the criteria of sapling growth and development of passionflower and guava plants. The experiment was conducted between 2018-2019 under greenhouse conditions. Saplings obtained from seed germination in Akdeniz University Faculty of Agriculture Research and Experiment Area were used as plant material. 3 different commercial preparations called Messenger, Crop-set and ISR-2000 were used as bioactivators. Plant height (cm), stem diameter (mm) and number of leaves (number / plant) were measured weekly, in order to determine the effect of the applications on the growth and development of saplings. At the end of the study, it was determined that the highest average plant height (10.17 cm), stem diameter (13.53 mm) were obtained in ISR-2000 application. The highest average plant height (11.93 cm), stem diameter (16.44 mm) and number of leaves (9.07 units / plant) were obtained from Messenger application in guava plant. When the results obtained are evaluated, it is recommended that ISR-2000 bioactivator can be applied in passionflower sapling cultivation and Messenger bioactivator can be applied for guava sapling cultivation.